<?php
/* SVN FILE: $Id$ */

/**
 * Basic Cake functionality.
 *
 * Core functions for including other source files, loading models and so forth.
 *
 * PHP versions 4 and 5
 *
 * CakePHP(tm) :  Rapid Development Framework (http://www.cakephp.org)
 * Copyright 2005-2008, Cake Software Foundation, Inc. (http://www.cakefoundation.org)
 *
 * Licensed under The MIT License
 * Redistributions of files must retain the above copyright notice.
 *
 * @filesource
 * @copyright     Copyright 2005-2008, Cake Software Foundation, Inc. (http://www.cakefoundation.org)
 * @link          http://www.cakefoundation.org/projects/info/cakephp CakePHP(tm) Project
 * @package       cake
 * @subpackage    cake.cake
 * @since         CakePHP(tm) v 0.2.9
 * @version       $Revision$
 * @modifiedby    $LastChangedBy$
 * @lastmodified  $Date$
 * @license       http://www.opensource.org/licenses/mit-license.php The MIT License
 */

/**
 * Basic defines for timing functions.
 */
define('SECOND', 1);
define('MINUTE', 60 * SECOND);
define('HOUR', 60 * MINUTE);
define('DAY', 24 * HOUR);
define('WEEK', 7 * DAY);
define('MONTH', 30 * DAY);
define('YEAR', 365 * DAY);

function load($filename,$vars=array(),$optional=false,$lib=false){
	if(file_exists($filename)){
		extract($vars, EXTR_SKIP);
		if($lib){
			require_once($filename);
		}else{
			include($filename);
		}
	}else{
		if(!$optional){
			throw new Exception('無法載入'.$type.': '.$name.' 於 '.$filename);
		}
	}
}

/**
 * Patch for PHP < 5.0
 */
if (!function_exists('clone')) {
	if (version_compare(PHP_VERSION, '5.0') < 0) {
		eval ('
		function clone($object)
		{
			return $object;
		}');
	}
}

/**
 * Loads configuration files. Receives a set of configuration files
 * to load.
 * Example:
 * <code>
 * config('config1', 'config2');
 * </code>
 *
 * @return boolean Success
 */
function config() {
	$args = func_get_args();
	foreach ($args as $arg) {
		if ($arg === 'database' && file_exists(CONFIGS . 'database.php')) {
			include_once(CONFIGS . $arg . '.php');
		} elseif (file_exists(CONFIGS . $arg . '.php')) {
			include_once(CONFIGS . $arg . '.php');

			if (count($args) == 1) {
				return true;
			}
		} else {
			if (count($args) == 1) {
				return false;
			}
		}
	}
	return true;
}

/**
 * Loads component/components from LIBS. Takes optional number of parameters.
 *
 * Example:
 * <code>
 * uses('flay', 'time');
 * </code>
 *
 * @param string $name Filename without the .php part
 * @deprecated
 */
function uses() {
	//$args = func_get_args();
	//foreach ($args as $file) {
	//	require_once('libs/' . strtolower($file) . '.php');
	//}
}

/**
 * Prints out debug information about given variable.
 *
 * Only runs if debug level is greater than zero.
 *
 * @param boolean $var Variable to show debug information for.
 * @param boolean $showHtml If set to true, the method prints the debug data in a screen-friendly way.
 * @param boolean $showFrom If set to true, the method prints from where the function was called.
 * @link http://book.cakephp.org/view/458/Basic-Debugging
 */
function debug($var = false, $showHtml = false, $showFrom = true) {
	if ($GLOBALS['debug'] > 0) {
		if ($showFrom) {
			$calledFrom = debug_backtrace();
			echo '<strong>' . substr(str_replace(ROOT, '', $calledFrom[0]['file']), 1) . '</strong>';
			echo ' (line <strong>' . $calledFrom[0]['line'] . '</strong>)';
		}
		echo "\n<pre class=\"cake-debug\">\n";

		$var = print_r($var, true);
		if ($showHtml) {
			$var = str_replace('<', '&lt;', str_replace('>', '&gt;', $var));
		}
		echo $var . "\n</pre>\n";
	}
}
if (!function_exists('getMicrotime')) {

	/**
	 * Returns microtime for execution time checking
	 *
	 * @return float Microtime
	 */
	function getMicrotime() {
		list($usec, $sec) = explode(' ', microtime());
		return ((float)$usec + (float)$sec);
	}
}
if (!function_exists('sortByKey')) {

	/**
	 * Sorts given $array by key $sortby.
	 *
	 * @param array $array Array to sort
	 * @param string $sortby Sort by this key
	 * @param string $order  Sort order asc/desc (ascending or descending).
	 * @param integer $type Type of sorting to perform
	 * @return mixed Sorted array
	 */
	function sortByKey(&$array, $sortby, $order = 'asc', $type = SORT_NUMERIC) {
		if (!is_array($array)) {
			return null;
		}

		foreach ($array as $key => $val) {
			$sa[$key] = $val[$sortby];
		}

		if ($order == 'asc') {
			asort($sa, $type);
		} else {
			arsort($sa, $type);
		}

		foreach ($sa as $key => $val) {
			$out[] = $array[$key];
		}
		return $out;
	}
}
if (!function_exists('array_combine')) {

	/**
	 * Combines given identical arrays by using the first array's values as keys,
	 * and the second one's values as values. (Implemented for backwards compatibility with PHP4)
	 *
	 * @param array $a1 Array to use for keys
	 * @param array $a2 Array to use for values
	 * @return mixed Outputs either combined array or false.
	 */
	function array_combine($a1, $a2) {
		$a1 = array_values($a1);
		$a2 = array_values($a2);
		$c1 = count($a1);
		$c2 = count($a2);

		if ($c1 != $c2) {
			return false;
		}
		if ($c1 <= 0) {
			return false;
		}
		$output = array();

		for ($i = 0; $i < $c1; $i++) {
			$output[$a1[$i]] = $a2[$i];
		}
		return $output;
	}
}

/**
 * Convenience method for htmlspecialchars.
 *
 * @param string $text Text to wrap through htmlspecialchars
 * @param string $charset Character set to use when escaping.  Defaults to config value in 'App.encoding' or 'UTF-8'
 * @return string Wrapped text
 * @link http://book.cakephp.org/view/703/h
 */
function h($text, $charset = null) {
	if (is_array($text)) {
		return array_map('h', $text);
	}
	if (empty($charset)) {
		$charset = Configure::read('App.encoding');
	}
	if (empty($charset)) {
		$charset = 'UTF-8';
	}
	return htmlspecialchars($text, ENT_QUOTES, $charset);
}

/**
 * Returns an array of all the given parameters.
 *
 * Example:
 * <code>
 * a('a', 'b')
 * </code>
 *
 * Would return:
 * <code>
 * array('a', 'b')
 * </code>
 *
 * @return array Array of given parameters
 * @link http://book.cakephp.org/view/694/a
 */
function a() {
	$args = func_get_args();
	return $args;
}

/**
 * Constructs associative array from pairs of arguments.
 *
 * Example:
 * <code>
 * aa('a','b')
 * </code>
 *
 * Would return:
 * <code>
 * array('a'=>'b')
 * </code>
 *
 * @return array Associative array
 * @link http://book.cakephp.org/view/695/aa
 */
function aa() {
	$args = func_get_args();
	$argc = count($args);
	for ($i = 0; $i < $argc; $i++) {
		if ($i + 1 < $argc) {
			$a[$args[$i]] = $args[$i + 1];
		} else {
			$a[$args[$i]] = null;
		}
		$i++;
	}
	return $a;
}

/**
 * Convenience method for echo().
 *
 * @param string $text String to echo
 * @link http://book.cakephp.org/view/700/e
 */
function e($text) {
	echo $text;
}

/**
 * Convenience method for strtolower().
 *
 * @param string $str String to lowercase
 * @return string Lowercased string
 * @link http://book.cakephp.org/view/705/low
 */
function low($str) {
	return strtolower($str);
}

/**
 * Convenience method for strtoupper().
 *
 * @param string $str String to uppercase
 * @return string Uppercased string
 * @link http://book.cakephp.org/view/710/up
 */
function up($str) {
	return strtoupper($str);
}

/**
 * Convenience method for str_replace().
 *
 * @param string $search String to be replaced
 * @param string $replace String to insert
 * @param string $subject String to search
 * @return string Replaced string
 * @link http://book.cakephp.org/view/708/r
 */
function r($search, $replace, $subject) {
	return str_replace($search, $replace, $subject);
}

/**
 * Print_r convenience function, which prints out <PRE> tags around
 * the output of given array. Similar to debug().
 *
 * @see	debug()
 * @param array $var Variable to print out
 * @param boolean $showFrom If set to true, the method prints from where the function was called
 * @link http://book.cakephp.org/view/707/pr
 */
function pr($var) {
	if ($GLOBALS['debug'] > 0) {
		echo '<pre>';
		print_r($var);
		echo '</pre>';
	}
}

/**
 * Display parameters.
 *
 * @param mixed $p Parameter as string or array
 * @return string
 */
function params($p) {
	if (!is_array($p) || count($p) == 0) {
		return null;
	}
	if (is_array($p[0]) && count($p) == 1) {
		return $p[0];
	}
	return $p;
}

/**
 * Merge a group of arrays
 *
 * @param array First array
 * @param array Second array
 * @param array Third array
 * @param array Etc...
 * @return array All array parameters merged into one
 * @link http://book.cakephp.org/view/696/am
 */
function am() {
	$r = array();
	$args = func_get_args();
	foreach ($args as $a) {
		if (!is_array($a)) {
			$a = array($a);
		}
		$r = array_merge($r, $a);
	}
	return $r;
}

/**
 * Gets an environment variable from available sources, and provides emulation
 * for unsupported or inconsistent environment variables (i.e. DOCUMENT_ROOT on
 * IIS, or SCRIPT_NAME in CGI mode).  Also exposes some additional custom
 * environment information.
 *
 * @param  string $key Environment variable name.
 * @return string Environment variable setting.
 * @link http://book.cakephp.org/view/701/env
 */
function env($key) {
	if ($key == 'HTTPS') {
		if (isset($_SERVER['HTTPS'])) {
			return (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off');
		}
		return (strpos(env('SCRIPT_URI'), 'https://') === 0);
	}

	if ($key == 'SCRIPT_NAME') {
		if (env('CGI_MODE') && isset($_ENV['SCRIPT_URL'])) {
			$key = 'SCRIPT_URL';
		}
	}

	$val = null;
	if (isset($_SERVER[$key])) {
		$val = $_SERVER[$key];
	} elseif (isset($_ENV[$key])) {
		$val = $_ENV[$key];
	} elseif (getenv($key) !== false) {
		$val = getenv($key);
	}

	if ($key === 'REMOTE_ADDR' && $val === env('SERVER_ADDR')) {
		$addr = env('HTTP_PC_REMOTE_ADDR');
		if ($addr !== null) {
			$val = $addr;
		}
	}

	if ($val !== null) {
		return $val;
	}

	switch ($key) {
		case 'SCRIPT_FILENAME':
			if (defined('SERVER_IIS') && SERVER_IIS === true) {
				return str_replace('\\\\', '\\', env('PATH_TRANSLATED'));
			}
			break;
		case 'DOCUMENT_ROOT':
			$name = env('SCRIPT_NAME');
			$filename = env('SCRIPT_FILENAME');
			$offset = 0;
			if (!strpos($name, '.php')) {
				$offset = 4;
			}
			return substr($filename, 0, strlen($filename) - (strlen($name) + $offset));
			break;
		case 'PHP_SELF':
			return str_replace(env('DOCUMENT_ROOT'), '', env('SCRIPT_FILENAME'));
			break;
		case 'CGI_MODE':
			return (PHP_SAPI === 'cgi');
			break;
		case 'HTTP_BASE':
			$host = env('HTTP_HOST');
			if (substr_count($host, '.') !== 1) {
				return preg_replace('/^([^.])*/i', null, env('HTTP_HOST'));
			}
			return '.' . $host;
			break;
	}
	return null;
}
if (!function_exists('file_put_contents')) {

	/**
	 * Writes data into file.
	 *
	 * If file exists, it will be overwritten. If data is an array, it will be join()ed with an empty string.
	 *
	 * @param string $fileName File name.
	 * @param mixed  $data String or array.
	 * @return boolean Success
	 */
	function file_put_contents($fileName, $data) {
		if (is_array($data)) {
			$data = join('', $data);
		}
		$res = @fopen($fileName, 'w+b');

		if ($res) {
			$write = @fwrite($res, $data);
			if ($write === false) {
				return false;
			} else {
				@fclose($res);
				return $write;
			}
		}
		return false;
	}
}

/**
 * Reads/writes temporary data to cache files or session.
 *
 * @param  string $path	File path within /tmp to save the file.
 * @param  mixed  $data	The data to save to the temporary file.
 * @param  mixed  $expires A valid strtotime string when the data expires.
 * @param  string $target  The target of the cached data; either 'cache' or 'public'.
 * @return mixed  The contents of the temporary file.
 * @deprecated Please use Cache::write() instead
 */
function cache($path, $data = null, $expires = '+1 day', $target = 'cache') {
	if (Configure::read('Cache.disable')) {
		return null;
	}
	$now = time();

	if (!is_numeric($expires)) {
		$expires = strtotime($expires, $now);
	}

	switch (low($target)) {
		case 'cache':
			$filename = CACHE . $path;
			break;
		case 'public':
			$filename = WWW_ROOT . $path;
			break;
		case 'tmp':
			$filename = TMP . $path;
			break;
	}
	$timediff = $expires - $now;
	$filetime = false;

	if (file_exists($filename)) {
		$filetime = @filemtime($filename);
	}

	if ($data === null) {
		if (file_exists($filename) && $filetime !== false) {
			if ($filetime + $timediff < $now) {
				@unlink($filename);
			} else {
				$data = @file_get_contents($filename);
			}
		}
	} elseif (is_writable(dirname($filename))) {
		@file_put_contents($filename, $data);
	}
	return $data;
}

/**
 * Used to delete files in the cache directories, or clear contents of cache directories
 *
 * @param mixed $params As String name to be searched for deletion, if name is a directory all files in directory will be deleted.
 *              If array, names to be searched for deletion.
 *              If clearCache() without params, all files in app/tmp/cache/views will be deleted
 *
 * @param string $type Directory in tmp/cache defaults to view directory
 * @param string $ext The file extension you are deleting
 * @return true if files found and deleted false otherwise
 */
function clearCache($params = null, $type = 'views', $ext = '.php') {
	if (is_string($params) || $params === null) {
		$params = preg_replace('/\/\//', '/', $params);
		$cache = CACHE . $type . DS . $params;

		if (is_file($cache . $ext)) {
			@unlink($cache . $ext);
			return true;
		} elseif (is_dir($cache)) {
			$files = glob($cache . '*');

			if ($files === false) {
				return false;
			}

			foreach ($files as $file) {
				if (is_file($file)) {
					@unlink($file);
				}
			}
			return true;
		} else {
			$cache = array(
			CACHE . $type . DS . '*' . $params . $ext,
			CACHE . $type . DS . '*' . $params . '_*' . $ext
			);
			$files = array();
			while ($search = array_shift($cache)) {
				$results = glob($search);
				if ($results !== false) {
					$files = array_merge($files, $results);
				}
			}
			if (empty($files)) {
				return false;
			}
			foreach ($files as $file) {
				if (is_file($file)) {
					@unlink($file);
				}
			}
			return true;
		}
	} elseif (is_array($params)) {
		foreach ($params as $file) {
			clearCache($file, $type, $ext);
		}
		return true;
	}
	return false;
}

/**
 * Recursively strips slashes from all values in an array
 *
 * @param array $values Array of values to strip slashes
 * @return mixed What is returned from calling stripslashes
 * @link http://book.cakephp.org/view/709/stripslashes_deep
 */
function stripslashes_deep($values) {
	if (is_array($values)) {
		foreach ($values as $key => $value) {
			$values[$key] = stripslashes_deep($value);
		}
	} else {
		$values = stripslashes($values);
	}
	return $values;
}

/**
 * Returns a translated string if one is found; Otherwise, the submitted message.
 *
 * @param string $singular Text to translate
 * @param boolean $return Set to true to return translated string, or false to echo
 * @return mixed translated string if $return is false string will be echoed
 * @link http://book.cakephp.org/view/693/__
 */
function __($singular, $return = false) {
	if (!$singular) {
		return;
	}
	if (!class_exists('I18n')) {
		App::import('Core', 'i18n');
	}

	if ($return === false) {
		echo I18n::translate($singular);
	} else {
		return I18n::translate($singular);
	}
}

/**
 * Returns correct plural form of message identified by $singular and $plural for count $count.
 * Some languages have more than one form for plural messages dependent on the count.
 *
 * @param string $singular Singular text to translate
 * @param string $plural Plural text
 * @param integer $count Count
 * @param boolean $return true to return, false to echo
 * @return mixed plural form of translated string if $return is false string will be echoed
 */
function __n($singular, $plural, $count, $return = false) {
	if (!$singular) {
		return;
	}
	if (!class_exists('I18n')) {
		App::import('Core', 'i18n');
	}

	if ($return === false) {
		echo I18n::translate($singular, $plural, null, 6, $count);
	} else {
		return I18n::translate($singular, $plural, null, 6, $count);
	}
}

/**
 * Allows you to override the current domain for a single message lookup.
 *
 * @param string $domain Domain
 * @param string $msg String to translate
 * @param string $return true to return, false to echo
 * @return translated string if $return is false string will be echoed
 */
function __d($domain, $msg, $return = false) {
	if (!$msg) {
		return;
	}
	if (!class_exists('I18n')) {
		App::import('Core', 'i18n');
	}

	if ($return === false) {
		echo I18n::translate($msg, null, $domain);
	} else {
		return I18n::translate($msg, null, $domain);
	}
}

/**
 * Allows you to override the current domain for a single plural message lookup.
 * Returns correct plural form of message identified by $singular and $plural for count $count
 * from domain $domain.
 *
 * @param string $domain Domain
 * @param string $singular Singular string to translate
 * @param string $plural Plural
 * @param integer $count Count
 * @param boolean $return true to return, false to echo
 * @return plural form of translated string if $return is false string will be echoed
 */
function __dn($domain, $singular, $plural, $count, $return = false) {
	if (!$singular) {
		return;
	}
	if (!class_exists('I18n')) {
		App::import('Core', 'i18n');
	}

	if ($return === false) {
		echo I18n::translate($singular, $plural, $domain, 6, $count);
	} else {
		return I18n::translate($singular, $plural, $domain, 6, $count);
	}
}

/**
 * Allows you to override the current domain for a single message lookup.
 * It also allows you to specify a category.
 *
 * The category argument allows a specific category of the locale settings to be used for fetching a message.
 * Valid categories are: LC_CTYPE, LC_NUMERIC, LC_TIME, LC_COLLATE, LC_MONETARY, LC_MESSAGES and LC_ALL.
 *
 * Note that the category must be specified with a numeric value, instead of the constant name.  The values are:
 * LC_CTYPE     0
 * LC_NUMERIC   1
 * LC_TIME      2
 * LC_COLLATE   3
 * LC_MONETARY  4
 * LC_MESSAGES  5
 * LC_ALL       6
 *
 * @param string $domain Domain
 * @param string $msg Message to translate
 * @param integer $category Category
 * @param boolean $return true to return, false to echo
 * @return translated string if $return is false string will be echoed
 */
function __dc($domain, $msg, $category, $return = false) {
	if (!$msg) {
		return;
	}
	if (!class_exists('I18n')) {
		App::import('Core', 'i18n');
	}

	if ($return === false) {
		echo I18n::translate($msg, null, $domain, $category);
	} else {
		return I18n::translate($msg, null, $domain, $category);
	}
}

/**
 * Allows you to override the current domain for a single plural message lookup.
 * It also allows you to specify a category.
 * Returns correct plural form of message identified by $singular and $plural for count $count
 * from domain $domain.
 *
 * The category argument allows a specific category of the locale settings to be used for fetching a message.
 * Valid categories are: LC_CTYPE, LC_NUMERIC, LC_TIME, LC_COLLATE, LC_MONETARY, LC_MESSAGES and LC_ALL.
 *
 * Note that the category must be specified with a numeric value, instead of the constant name.  The values are:
 * LC_ALL       0
 * LC_COLLATE   1
 * LC_CTYPE     2
 * LC_MONETARY  3
 * LC_NUMERIC   4
 * LC_TIME      5
 * LC_MESSAGES  6
 *
 * @param string $domain Domain
 * @param string $singular Singular string to translate
 * @param string $plural Plural
 * @param integer $count Count
 * @param integer $category Category
 * @param boolean $return true to return, false to echo
 * @return plural form of translated string if $return is false string will be echoed
 */
function __dcn($domain, $singular, $plural, $count, $category, $return = false) {
	if (!$singular) {
		return;
	}
	if (!class_exists('I18n')) {
		App::import('Core', 'i18n');
	}

	if ($return === false) {
		echo I18n::translate($singular, $plural, $domain, $category, $count);
	} else {
		return I18n::translate($singular, $plural, $domain, $category, $count);
	}
}

/**
 * The category argument allows a specific category of the locale settings to be used for fetching a message.
 * Valid categories are: LC_CTYPE, LC_NUMERIC, LC_TIME, LC_COLLATE, LC_MONETARY, LC_MESSAGES and LC_ALL.
 *
 * Note that the category must be specified with a numeric value, instead of the constant name.  The values are:
 * LC_CTYPE     0
 * LC_NUMERIC   1
 * LC_TIME      2
 * LC_COLLATE   3
 * LC_MONETARY  4
 * LC_MESSAGES  5
 * LC_ALL       6
 *
 * @param string $msg String to translate
 * @param integer $category Category
 * @param string $return true to return, false to echo
 * @return translated string if $return is false string will be echoed
 */
function __c($msg, $category, $return = false) {
	if (!$msg) {
		return;
	}
	if (!class_exists('I18n')) {
		App::import('Core', 'i18n');
	}

	if ($return === false) {
		echo I18n::translate($msg, null, null, $category);
	} else {
		return I18n::translate($msg, null, null, $category);
	}
}

/**
 * Computes the difference of arrays using keys for comparison.
 *
 * @param array First array
 * @param array Second array
 * @return array Array with different keys
 */
if (!function_exists('array_diff_key')) {
	function array_diff_key() {
		$valuesDiff = array();

		$argc = func_num_args();
		if ($argc < 2) {
			return false;
		}

		$args = func_get_args();
		foreach ($args as $param) {
			if (!is_array($param)) {
				return false;
			}
		}

		foreach ($args[0] as $valueKey => $valueData) {
			for ($i = 1; $i < $argc; $i++) {
				if (array_key_exists($valueKey, $args[$i])) {
					continue 2;
				}
			}
			$valuesDiff[$valueKey] = $valueData;
		}
		return $valuesDiff;
	}
}

/**
 * Computes the intersection of arrays using keys for comparison
 *
 * @param array First array
 * @param array Second array
 * @return array Array with interesected keys
 */
if (!function_exists('array_intersect_key')) {
	function array_intersect_key($arr1, $arr2) {
		$res = array();
		foreach ($arr1 as $key => $value) {
			if (array_key_exists($key, $arr2)) {
				$res[$key] = $arr1[$key];
			}
		}
		return $res;
	}
}

/**
 * Shortcut to Log::write.
 *
 * @param string $message Message to write to log
 */
function LogError($message) {
	if (!class_exists('CakeLog')) {
		App::import('Core', 'CakeLog');
	}
	$bad = array('\n', '\r', '\t');
	$good = ' ';
	CakeLog::write('error', str_replace($bad, $good, $message));
}

/**
 * Searches include path for files.
 *
 * @param string $file File to look for
 * @return Full path to file if exists, otherwise false
 * @link http://book.cakephp.org/view/702/fileExistsInPath
 */
function fileExistsInPath($file) {
	$paths = explode(PATH_SEPARATOR, ini_get('include_path'));
	foreach ($paths as $path) {
		$fullPath = $path . DS . $file;

		if (file_exists($fullPath)) {
			return $fullPath;
		} elseif (file_exists($file)) {
			return $file;
		}
	}
	return false;
}

/**
 * Convert forward slashes to underscores and removes first and last underscores in a string
 *
 * @param string String to convert
 * @return string with underscore remove from start and end of string
 * @link http://book.cakephp.org/view/697/convertSlash
 */
function convertSlash($string) {
	$string = trim($string, '/');
	$string = preg_replace('/\/\//', '/', $string);
	$string = str_replace('/', '_', $string);
	return $string;
}

/**
 * Implements http_build_query for PHP4.
 *
 * @param string $data Data to set in query string
 * @param string $prefix If numeric indices, prepend this to index for elements in base array.
 * @param string $argSep String used to separate arguments
 * @param string $baseKey Base key
 * @return string URL encoded query string
 * @see http://php.net/http_build_query
 */
if (!function_exists('http_build_query')) {
	function http_build_query($data, $prefix = null, $argSep = null, $baseKey = null) {
		if (empty($argSep)) {
			$argSep = ini_get('arg_separator.output');
		}
		if (is_object($data)) {
			$data = get_object_vars($data);
		}
		$out = array();

		foreach ((array)$data as $key => $v) {
			if (is_numeric($key) && !empty($prefix)) {
				$key = $prefix . $key;
			}
			$key = urlencode($key);

			if (!empty($baseKey)) {
				$key = $baseKey . '[' . $key . ']';
			}

			if (is_array($v) || is_object($v)) {
				$out[] = http_build_query($v, $prefix, $argSep, $key);
			} else {
				$out[] = $key . '=' . urlencode($v);
			}
		}
		return implode($argSep, $out);
	}
}

/**
 * Wraps ternary operations. If $condition is a non-empty value, $val1 is returned, otherwise $val2.
 * Don't use for isset() conditions, or wrap your variable with @ operator:
 * Example:
 * <code>
 * ife(isset($variable), @$variable, 'default');
 * </code>
 *
 * @param mixed $condition Conditional expression
 * @param mixed $val1 Value to return in case condition matches
 * @param mixed $val2 Value to return if condition doesn't match
 * @return mixed $val1 or $val2, depending on whether $condition evaluates to a non-empty expression.
 * @link http://book.cakephp.org/view/704/ife
 */
function ife($condition, $val1 = null, $val2 = null) {
	if (!empty($condition)) {
		return $val1;
	}
	return $val2;
}


?>